Printer ribbon cassette



FIG. 1 is a front elevation of a printer ribbon cassette showing my new design;

FIG. 2 is a rear elevation thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left end elevation thereof;

FIG. 6 is a right end elevation thereof;

FIG. 7 is a front perspective view thereof; and

FIG. 8 is a rear perspective view thereof. 

The design for a printer ribbon cassette, substantially as herein shown and described. 